initializing of constant variable using method (C#)

Question

Is it possible to initializing value of a constant value using method of another class

namespace ConsoleApplication1
{
    class Program
    {
        const int gravit = haha.habc();//something like this
        static void Main(string[] args)
        {
            some codes.....

        }
        public class haha
        {
            int gar = 1;
            public int habc()
            {
                int sa = 1;
                return sa;
            }

        }
    }
}

For example like the codes above(FYI with this code I am getting Expression being assigned to ... must be constant), if not is there other method to do something similar to this.

Answer 1

No, that's not possible, you could use readonly field instead because constant values should be known at compile-time:

private static readonly int gravit = haha.habc();//something like this

NOTE: the habc method should be static if you want to call it that way.

Answer 2

Constants are values which should be known at compile time and do not change. So the ReadOnly is the option you should go with.

private readonly int gravit = haha.habc();